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2017 ; 7
(ä): 43434
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Untangling the role of one-carbon metabolism in colorectal cancer risk: a
comprehensive Bayesian network analysis
#MMPMID28233834
Myte R
; Gylling B
; Häggström J
; Schneede J
; Magne Ueland P
; Hallmans G
; Johansson I
; Palmqvist R
; Van Guelpen B
Sci Rep
2017[Feb]; 7
(ä): 43434
PMID28233834
show ga
The role of one-carbon metabolism (1CM), particularly folate, in colorectal
cancer (CRC) development has been extensively studied, but with inconclusive
results. Given the complexity of 1CM, the conventional approach, investigating
components individually, may be insufficient. We used a machine learning-based
Bayesian network approach to study, simultaneously, 14 circulating one-carbon
metabolites, 17 related single nucleotide polymorphisms (SNPs), and several
environmental factors in relation to CRC risk in 613 cases and 1190 controls from
the prospective Northern Sweden Health and Disease Study. The estimated networks
corresponded largely to known biochemical relationships. Plasma concentrations of
folate (direct), vitamin B6 (pyridoxal 5-phosphate) (inverse), and vitamin B2
(riboflavin) (inverse) had the strongest independent associations with CRC risk.
Our study demonstrates the importance of incorporating B-vitamins in future
studies of 1CM and CRC development, and the usefulness of Bayesian network
learning for investigating complex biological systems in relation to disease.